Additional Images
The second well-known photo of RSh-12 from the another exhibition, apparently, also in 2014. This is a different version (perhaps a newer one), differs in the size and number of vent holes (3 large instead of 4 small), equipped with a muzzle brake, and with round cylinder.
Talk
If someone is suddenly interested, then they went even further: [1]. --Slon95 (talk) 10:05, 26 June 2020 (EDT)